Lol, the collector's editions are pretty rare here. The only "collector's editions" that are here are the games with the stuff you're supposed to get by pre-order. Which are often posters, early unlockables, art books or figurines. So nothing special.
There are a few exceptions though. If the game is really popular, like Call of Duty, it DOES have the extra stuff like in other countries. So for example, the Prestige Edition of Modern Warfare 2 DOES have a nightsight.